A microgravimetric study of simultaneous adsorption of anions and copper on polycrystalline Pt surfaces
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000700022 |
Resumo: | The underpotential deposition of Cu was studied in four different acid electrolytes by simultaneous measurements of cyclic voltammetry and microgravimetry using a electrochemical quartz crystal microbalance. The influence of anions on the Cu monolayer was determined. Among the three desorption peaks observed, the first was found to be very sensitive to the nature of the anion present in solution. This was related to the low coverage of the Pt surface by ad-atoms, in the respective potential range, which yields a weak interaction between the Cu ad-atoms. The monolayer is composed of a first layer of Cu adsorbed on Pt and a second layer of anions adsorbed on the Cu ad-atoms, with each anion occupying two adjacent Cu atoms, with the exception of the Cl- anion which was deposited on only one Cu ad-atom. This structure consequently forms a bi-layer deposit. The modification of voltammetric and massogram profiles by adding Cl- to the perchlorate electrolyte was also analyzed. |
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A microgravimetric study of simultaneous adsorption of anions and copper on polycrystalline Pt surfacesunderpotential depositionad-atomquartz crystal microbalancemassogramanionsadsorptionThe underpotential deposition of Cu was studied in four different acid electrolytes by simultaneous measurements of cyclic voltammetry and microgravimetry using a electrochemical quartz crystal microbalance. The influence of anions on the Cu monolayer was determined. Among the three desorption peaks observed, the first was found to be very sensitive to the nature of the anion present in solution. This was related to the low coverage of the Pt surface by ad-atoms, in the respective potential range, which yields a weak interaction between the Cu ad-atoms. The monolayer is composed of a first layer of Cu adsorbed on Pt and a second layer of anions adsorbed on the Cu ad-atoms, with each anion occupying two adjacent Cu atoms, with the exception of the Cl- anion which was deposited on only one Cu ad-atom. This structure consequently forms a bi-layer deposit. The modification of voltammetric and massogram profiles by adding Cl- to the perchlorate electrolyte was also analyzed.Sociedade Brasileira de Química2006-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000700022Journal of the Brazilian Chemical Society v.17 n.7 2006reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532006000700022info:eu-repo/semantics/openAccessMiwa,D. W.Santos,M. C.Machado,S. A. S.eng2007-01-29T00:00:00Zoai:scielo:S0103-50532006000700022Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2007-01-29T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
A microgravimetric study of simultaneous adsorption of anions and copper on polycrystalline Pt surfaces |
title |
A microgravimetric study of simultaneous adsorption of anions and copper on polycrystalline Pt surfaces |
spellingShingle |
A microgravimetric study of simultaneous adsorption of anions and copper on polycrystalline Pt surfaces Miwa,D. W. underpotential deposition ad-atom quartz crystal microbalance massogram anions adsorption |
title_short |
A microgravimetric study of simultaneous adsorption of anions and copper on polycrystalline Pt surfaces |
title_full |
A microgravimetric study of simultaneous adsorption of anions and copper on polycrystalline Pt surfaces |
title_fullStr |
A microgravimetric study of simultaneous adsorption of anions and copper on polycrystalline Pt surfaces |
title_full_unstemmed |
A microgravimetric study of simultaneous adsorption of anions and copper on polycrystalline Pt surfaces |
title_sort |
A microgravimetric study of simultaneous adsorption of anions and copper on polycrystalline Pt surfaces |
author |
Miwa,D. W. |
author_facet |
Miwa,D. W. Santos,M. C. Machado,S. A. S. |
author_role |
author |
author2 |
Santos,M. C. Machado,S. A. S. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Miwa,D. W. Santos,M. C. Machado,S. A. S. |
dc.subject.por.fl_str_mv |
underpotential deposition ad-atom quartz crystal microbalance massogram anions adsorption |
topic |
underpotential deposition ad-atom quartz crystal microbalance massogram anions adsorption |
description |
The underpotential deposition of Cu was studied in four different acid electrolytes by simultaneous measurements of cyclic voltammetry and microgravimetry using a electrochemical quartz crystal microbalance. The influence of anions on the Cu monolayer was determined. Among the three desorption peaks observed, the first was found to be very sensitive to the nature of the anion present in solution. This was related to the low coverage of the Pt surface by ad-atoms, in the respective potential range, which yields a weak interaction between the Cu ad-atoms. The monolayer is composed of a first layer of Cu adsorbed on Pt and a second layer of anions adsorbed on the Cu ad-atoms, with each anion occupying two adjacent Cu atoms, with the exception of the Cl- anion which was deposited on only one Cu ad-atom. This structure consequently forms a bi-layer deposit. The modification of voltammetric and massogram profiles by adding Cl- to the perchlorate electrolyte was also analyzed. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-12-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000700022 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000700022 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532006000700022 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.17 n.7 2006 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318167425548288 |